1.

Cell would normally proceed to mitosis without interruptionA. once it has entered the S phaseB. once it has entered the `G_(2)` phaseC. at any time during cell division activityD. none of these

Answer» Correct Answer - A
The availability of mitogen and energy rich compounds decide wheter `G_(1)` phase will be arrested (`G_(0)` phase) or undergo S-phase. This point is called check point or `G_(1)` cyclin or `G_(1)` point. Once the check point of `G_(1)`-phase is crossed and cell has entered S-phase, cell cycle will go on further division till completion.


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